Wall construction

ABSTRACT

A downwardly opening upper channel member ( 10 ) is positioned above an upwardly opening lower channel member ( 12 ). A lower end portion of a stud ( 14 ) is received in the lower channel member ( 12 ). A clip ( 54 ) is received in an upper end portion of the stud bracket ( 10 ). The clip ( 54 ) has an upper portion that is connected to the upper channel member ( 10 ). It also has a lower portion that extends downwardly into an upper end portion of its stud ( 14 ). The upper channel member ( 10 ) has opposite side flanges ( 20,22 ) that include lower edges ( 32,34 ) the stud ( 14 ) has an upper butt end that is positioned above the lower edge ( 32,34 ) is below an upper web portion ( 18 ) of the upper channel member ( 10 ). The upper portion of the clip ( 54 ) is connected to the upper channel member ( 10 ). The clip ( 54 ) is free to move vertically with respect to the stud ( 14 ). In a wall construction, wallboard sheeting WS is connected to the stud ( 14 ) and the lower channel member ( 12 ) but not to the upper channel member ( 10 ). As a result, relative vertical movement is permitted between the upper channel member ( 10 ) and the rest of the wall which includes the stud ( 14 ), the lower channel member ( 12 ) and the wallboard sheeting WS.

TECHNICAL FIELD

This invention relates to wall structures composed of metal framing and wallboard sheeting connected to the framing. More particularly, it relates to a simple way of providing for relative movement between an upper channel member, or header, and the rest of the wall, in response to wall movement such as may occur during an earthquake, for example.

BACKGROUND OF THE INVENTION

It is well known to use metal framing in building wall construction. Commonly, the framing comprises a downwardly opening upper channel, or header, an upwardly opening upper channel, or footer, and vertical studs extending between the channels and having end portions that are within the channels. An advantage of using metal framing members is that they provide a strong frame structure that can be configured to accommodate for movement of the buildings such as occurs during an earthquake, without resulting in damage to the wall of which the framing is a part.

Typically, the upper channel member is secured to an upper concrete structure and the lower channel member is secured to a lower concrete structure. During an earthquake, and at other times as well, there is relative movement between the two concrete structures. It is necessary that the framing that extends between the concrete structures be able to accommodate the relative movement without damage to the framing and the wall of which it is a part. Relative movement between the two concrete structures can be caused by earthquakes, roof loads, expansion and contraction, loading and unloading upper floors in multi-story buildings, settling, and wind loads, for example.

U.S. Pat. No. 5,127,203, granted Jul. 7, 1992, to Robert F. Paquette, and U.S. Pat. No. 5,127,760, granted Jul. 7, 1992, to Todd A. Brady, each discloses the use of vertical slots in the flanges of overhead channels, for receiving screws that are used to secure upper end portions of the studs to the overhead channels. The overhead channels are provided with a plurality of slots so that a stud can be selectively positioned at a number of locations along the channel length. Screw fasteners are inserted through the slots and are then screwed into the upper end portions of the studs. In response to movement of the building, the upper channel member is movable relative to the studs and the wallboard that is connected to the studs. A problem with this use of slots is that constructing the upper channel members to include the slots is an added expense. Also, the slots weaken the metal. It often becomes necessary to use a heavier gauge metal to compensate for the loss in strength caused by use of the slots. This adds addition expense as heavier gauge metal is more expensive than lighter gauge metal.

U.S. Pat. No. 5,685,121, granted Nov. 11, 1997, to Frank DeFrancesco and Joseph Domenick Palumbo, discloses a use of a two-section stud. The upper end of the upper section is an upper channel and the lower end of the lower section is in a lower channel. The upper section is telescopically received within the lower section and includes a pair of slots that extend throughout a substantial portion of the length of the upper section. A problem with this construction is that the location of the slots cannot be determined for sure and the fasteners used may end up securing the lower section to the upper section. The installers must place the wallboard sheeting on the studs and then drill through the sheeting and the outer flange of the lower section of the stud at locations which are outwardly of the slots in the upper sections of the studs. If a screw fastener is not in alignment with a slot, it will screw into the metal bordering the slot. As a result, the upper and lower sections of the stud will be screwed together and relative movement between the two will be prevented. In such an event, the two sections of the stud are not free to move relative to each other in response to seismic or other forces to which the wall may be subjected. Also, it is difficult and expensive to make the long slots, to provide the upper section with a flared upper end, and to provide the upper section with the longitudinal V-shaped flanges that are a part of the system. Also, considerable more steel is needed in a wall that uses the two-section stud of this system.

There is a need for a wall construction that permits movement of the upper channel member relative to the rest of the wall in a positive manner without adding substantial manufacturing and/or installation costs. A principal object of the present invention is to provide such a wall structure.

BRIEF SUMMARY OF THE INVENTION

A wall structure to which the present invention relates comprises a downwardly opening upper channel member that includes an upper web and a pair of spaced apart side flanges depending from the upper web to the lower edges. The upper web and the side flanges form a channel space below the upper web and between the side flanges. The wall structure also includes a plurality of vertically extending studs that are horizontally spaced apart. Each stud includes an upper end portion and an upper butt end. The upper end portions of the studs are received in the channel space, with the butt ends of the studs positioned above the lower edges of the side flanges of the upper channel member. According to the invention, each stud is provided with a clip. Each clip comprises an upper portion that is received in and secured to the upper channel member, and a lower portion that extends downwardly from the upper portion into the upper end portion of its stud. The lower end portion of each clip is snuggly received within, and preferably makes frictional engagement with, the upper end portion of its stud. The studs are moveable up and down in the channel space relative to both the clips and the upper channel member when subjected to a force that overcomes the frictional forces.

In preferred form, each stud comprises a web extending perpendicular to the side flanges of the upper channel and front and rear flanges connected to the web. The front and rear flanges extend parallel to the side flanges of the upper channel. The studs include lips that are connected to the flanges and extend inwardly towards each other, in coplanar parallelism. The lips are in spaced parallelism with the web. Also in preferred form, the clip has front and rear boundaries that are contiguous stud flanges.

In one embodiment, each clip comprises a web that is inwardly contiguous the web of its stud and front and rear flanges connected to the web of the clip that are inwardly contiguous front and rear flanges of its stud. The clip and stud combination of this invention requires much less steel than the two-section stud disclosed by U.S. Pat. No. 5,685,121. More specifically, that system requires approximately fifty percent more steel than the clip and stud system provided by the present invention.

According to an aspect of the invention, screw fasteners extend through the side flanges of the upper channel and through the front and rear flanges of the upper portions of the clips. Upper portions of the front and rear flanges of each stud are sandwiched between the side flanges of the upper channel and lower portions of the front and rear flanges of the clip.

It is an object of the present invention to provide framing for internal walls, framing for external walls and framing that can be used in both internal and external walls. External building walls generally have larger side loads (e.g. wind loads) on them than interior walls.

According to an embodiment of the invention, the web of the clip, or the web of the stud includes at least one vertical slot. A screw fastener extends through the other web and through the slot and connects the clip to the stud. The slot is sized and positioned to allow up and down movement of the clip relative to the stud and the upper channel member.

In another embodiment of the invention, the clips included lips that are inwardly contiguous the lips on their stud. A vertical slot is provided in at least one lip on either the clip or the stud and for each slot a screw fastener extends through the other lip and the slot and connects the clip to the stud. The slot is of a length and is positioned to allow vertical movement of the clips relative to the studs and the upper channel member.

In still another embodiment, the clips are telescopically received within the studs and the clips include longitudinal channels in which the lips on the studs are received.

According to a further aspect of the invention, clips are provided that include at least one upper portion that extends perpendicular to the stud and parallel to the upper web of the upper channel member. At least one screw fastener connects said upper portion of the clip to the upper web of the upper channel member. Each clip may include two upper portions which extend perpendicular to its stud and parallel to the upper web of the upper channel member. In such case one of the upper portions extends along the upper channel member in a first direction from the clip. The other upper portion extends along the upper channel member in the opposite direction from the clip. At least one fastener is used to connect at least one of said upper portion of each clip to the upper web of the upper channel member. In one embodiment, each upper portion of the clip is connected to the upper web of the upper channel member by at least one fastener.

In a typical wall, the framing includes an upwardly opening lower channel member having a lower web and a pair of spaced apart flanges extending upwardly from the lower web to upper edges. The lower web and side flanges form a channel space above the lower web and between the side flanges. The studs include lower end portions that are received in the channel space. The studs have lower butt ends that contact the lower web.

A feature of the invention is that vertical studs are supported at their lower ends in an upwardly opening lower channel member and the studs include upper end portions that project upwardly into an upper channel space formed in a downwardly opening upper channel member. The upper end portions of the studs are contiguous side flanges of the upper channel member and include butt ends that are spaced downwardly from an upper web portion of the upper channel member. A clip is provided for each stud. Each clip includes an upper portion that is connected to an upper channel member and a lower portion that extends downwardly into its stud. This construction allows the upper end portions of the studs to be braced longitudinally and laterally of the upper channel member while at the same time permits the studs and the rest of the wall below the upper channel member to move up and down relative to the upper channel member, and also allows the upper channel member to move up and down relative to the studs and the rest of the wall.

According to an aspect of the invention, the upper end portions of the clips can be adapted to be connected to the web of the upper channel member or can be adapted to be connected to the side flanges of the upper channel member.

According to a further aspect of the invention, fasteners that secure sheeting to the studs enter into the studs but not into either the clips or the upper channel member.

The present invention includes providing a wall framing system in which there are yieldable connections between the studs and an overhead channel member. There is telescopic engagement of the studs with clips that are connected to the overhead channel member. This connection transfers longitudinal and lateral wall forces between the studs and the clips. The clips then transfer these forces to the upper channel member. In the connection, front and rear wall parts of the upper portions of the studs are sandwiched between lower end portions of the clips and side flange portions of the upper channel member.

The upper channel member forms what is sometimes referred to as an upper track. The essential parts of the upper track are the side panels that form a channel or track space between them. It is within the scope of the present invention to employ an upper track that is composed of two angle iron members. Each angle iron member includes a horizontal upper flange that is used to secure it to the overhead structure and a vertical flange that provides the side flange of the track.

Other objects, advantages and features of the invention will become apparent from the detailed description that is set forth below, from the drawings and from the claims.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

Like reference numerals are used to designate like parts throughout the several views of the drawing, and:

FIG. 1 is a fragmentary pictorial view looking towards the assembly of an upper channel member, a lower channel member, a stud having an upper end portion, and a clip in said upper end portion, said clip being shown connected to the upper channel member, said view being taken from above, with the mid portion of the stud being broken away for purposes of indicating indeterminate length;

FIG. 2 is an exploded pictorial view of the framing assembly shown by FIG. 1, such view including a fragmentary portion of some sheeting that is connected to the stud;

FIG. 3 is a fragmentary side elevational view looking towards framing composed of an upper channel, a lower channel, a plurality of spaced apart, parallel studs extending between the two channels, and wallboard sheeting connected to the studs;

FIG. 4 is a sectional view taken substantially along line 4-4 of FIG. 3;

FIG. 5 is a sectional view taken substantially along line 5-5 of FIG. 3;

FIG. 6 is a view like FIG. 4 but showing additional layers of wallboard sheeting;

FIG. 7 is a view like FIG. 6 and also showing additional layers of wallboard sheeting;

FIG. 8 is a pictorial view of the clip that is shown in FIGS. 1, 2, 5 and 7;

FIG. 9 is a view like FIG. 8 but of a modified form of clip;

FIG. 10 is a view like FIGS. 8 and 9 but of another form of clip;

FIG. 11 is a view like FIGS. 8-10 but of yet another form of clip;

FIG. 12 is a view like FIGS. 8-11 but of a further form of clip;

FIG. 13 is a view like FIGS. 8-12 but of a yet another form of clip;

FIG. 14 is a view like FIGS. 8-13 but of yet another form of clip;

FIG. 15 is an end elevational view of the stud shown in FIG. 14;

FIG. 16 is an end elevational view of the clip shown in FIG. 14;

FIG. 17 is an end view of the clip shown by FIG. 14 when telescopically received within the stud shown by FIG. 14;

FIG. 18 is a pictorial view of an upper end portion of a stud and another form of clip;

FIG. 19 is a view like FIG. 18 showing still another form of clip;

FIG. 20 is a side elevational view of a screw adapted to drill its way into metal, with it leading end spaced from two thicknesses of metal;

FIG. 21 is an end view of the head end of the screw shown by FIG. 20;

FIG. 22 is a view like FIG. 20 but showing the screw extended through both thicknesses of metal;

FIG. 23 is an end view at the forward end of the screw shown by FIGS. 20-22;

FIG. 24 is a view of a screw like the screw shown in FIGS. 20 and 22, shown spaced from two metal members, the nearest one of which has a preformed opening in it;

FIG. 25 is a view similar to FIG. 24, but showing a screw that includes a shoulder adjacent the head, adapted to enter a slot and keep the head from clamping down on the metal member that includes the slot;

FIG. 26 is a view like FIG. 25, but showing the screw installed;

FIG. 27 is a pictorial view of a clip in telescopic engagement with the upper portion of a stud, such view showing a longitudinal slot in the web of the stud that is contiguous the web of the clip;

FIG. 28 is a view like FIG. 27, but showing the clip spaced endwise outwardly from the stud, and showing a screw fastener in a spaced relationship with the slot in the stud and an opening in the clip;

FIG. 29 is a view like FIG. 27, but showing two longitudinal slots in the web of the stud;

FIG. 30 is a view like FIG. 28, but showing two longitudinal slots in the web of the stud and two screw fasteners used for connecting the stud to the clip;

FIG. 31 is an end view of a clip inside of a stud, such view showing the clip having relatively wide lips and showing broken lines where screw fasteners extend through the lips of the clip and the web of the stud;

FIG. 32 is a view like FIG. 31, but showing the stud having relatively wide lips and including broken lines indicating where screw fasteners extend through the stud lips and the web of the clip;

FIG. 33 is a pictorial view of an embodiment of the invention in which the clip is positioned within the upper channel space on the outside of the web of the stud, such view showing slots in the web of the stud and screw fasteners extending through the slots and screwing into the web of the clip;

FIG. 34 an elevational view looking towards the inside of the stud web and showing the heads of the screw fasteners;

FIG. 35 is a fragmentary view showing an upper end portion of a stud, a portion of the upper channel member and a clip in the channel member positioned next to the upper end portion stud, such view including a broken line showing the location of a screw fastener that extends through a slot in the stud web and screws into the web of the clip; and

FIG. 36 is a view like FIG. 7, but showing an upper track that is formed by a pair of angle members, arranged with their upper legs or flanges projecting laterally outwardly from their vertical legs or flanges which form the track space between them.

DETAILED DESCRIPTION OF THE INVENTION

FIGS. 1-7 show wall framing comprising an upper sheet metal channel member 10, a lower sheet metal channel member 12 and a plurality of studs 14 that are supported at their lower ends in the lower sheet metal channel 12 and at their upper ends project into a channel space 16 formed below an upper web 18 and between a pair of side flanges 20, 22 that depend from the web 18. The lower channel 12 includes a channel space 24 that is defined above a lower web 26 and between a pair of side flanges 28, 30 that project upwardly from the lower web 26. The upper flanges 20, 22 include lower edges 32, 34. The lower flanges 28, 30 include upper edges 34, 36. As shown by FIG. 3, a plurality of sheet metal studs 14 are spaced apart along the channels 10, 12. The studs 14 are parallel to each other and are perpendicular to the channels 10, 12.

Referring to FIGS. 1 and 2, in particular, each studs 14 preferably has a web 40, front and rear (or first and second) flanges 42, 44 and a pair of lips 46, 48. The flanges 42, 44 are parallel to each other and are perpendicular to the web 40. The lips 46, 48 are in spaced, coplanar parallelism with and are perpendicular to the flanges 42, 44. They are also parallel to the web 40. The front to rear dimension of the studs substantially equals the distance between the side flanges 28, 30 of the lower channel member 12. Web 40 and lips 46, 48 extend perpendicular to the upper side flanges 20, 22 and the lower side flanges 28, 30.

Each stud 14 includes a lower butt end 50 and an upper butt end 52. Butt end 50 preferably rests on the web 26. Butt end 52 is spaced above the lower edges 32, 34 a distance x and below the upper web 18 a distance y. As will hereinafter be explained, the dimensions x, y are variable dimensions. This is because the framing permits relative vertical movement between the upper channel 10 and the rest of the wall structure that includes the studs 14 and the lower channel member 12. FIG. 1 shows an at rest position. When the wall structure is in this position, the dimension x is smaller than the dimension y but is large enough to provide substantial lateral bracing between the upper end portions of the studs 14 and the side flanges 20, 22 of the upper channel member 10.

According to the invention, a separate clip 54 is provided for each stud 12. Each clip 54 has an upper portion that extends upwardly into the channel space 16 and a lower portion that extends downwardly into the upper end of its stud 14. As will hereinafter be described, the upper portions of the clips 54 are connected to the upper channel members 10 whereas the lower portions of the clips 54 extend downwardly into the upper end portions of the studs 14 and make a relatively snug fit with the interior surfaces of the stud 14.

FIGS. 1-8 show a first embodiment of a clip 54. It has an upper butt end 56, a lower butt end 58, a web 60, a pair of flanges 62, 64 and a pair of lips 66, 68. As can be readily seen, the cross sectional configuration of the clip 54 is like the cross sectional configuration of the studs 14 except that its dimensions are smaller so that its lower portion can snugly fit within the upper portion of the stud 14. When this form of clip 54 is within the upper end portion of a stud 14, its flanges 62, 64 are inwardly contiguous the flanges 42, 44 of the stud 14. Its web 60 is inwardly contiguous the web 40 of the stud 14. Its lips 66, 68 are inwardly contiguous the lips 46, 48 of the stud 14.

Preferably, the lower end portion of each clip 54 is dimensioned such that it frictionally engages the inner surfaces of the upper end portions of its stud 14. As best shown by FIGS. 5 and 7, when the lower end portion of each clip 54 is within the upper end portion of its stud 14, the outer surfaces of the stud flanges 62, 64 are spaced inwardly from the side flanges 20, 22 of the upper channel member 10 a distance substantially equal to the thickness of a stud flange 62, 64. Upper portions of the stud flanges 42, 44 are sandwiched between lower portions of the side flanges 20, 22 of the upper channel 10 and adjacent portions of the clip flanges 62, 64.

As shown by FIGS. 1 and 2, screw fasteners are inserted at locations SF through the sidewalls 20, 22 of the upper channel member 10. The screw fasteners and screw into the clip flanges 62, 64 at a location between the upper web 18 and the upper butt end 52 of the stud 14. No fasteners are inserted through the upper side flanges 20, 22 and the stud flanges 42, 44. When the screw fasteners are tightened, the side flanges 20, 22 of the upper flange 10 are drawn towards the clip flanges 62, 64. This increases the frictional forces acting between the stud flanges 46, 48, the clip flanges 62, 64 and the side flanges 20, 22 of the upper channel 10.

The distance x is always sufficiently long that contact is made between the stud flanges 42, 44 and the side flanges 20, 22 of the upper channel 10. This allows the use of a short clip 54. Also, the clip 54 can have a cross sectional dimension that is smaller than the cross sectional dimension of the stud 14.

The contact between the squared upper end 56 of the clip 54 and the web 18 will lock the clip 54 substantially perpendicular to the web 18 by the use of only two screw fasteners. This perpendicular orientation of the clip 54, and the telescopic engagement of the lower portion of the clip 54 with the upper portion of the stud 14, and the containment of the upper end portion of the stud 14 in the channel space 16 between the side flanges 20, 22, will provide a connection that is substantially fixed (will carry a moment) in all directions except the vertical direction. Relative movement in the vertical direction is permitted because of the telescopic engagement of the clip 54 with the stud 14. The contact between the squared lower end 50 of the stud 44 with the lower web 26 also helps maintain the stud 14 in a substantially vertical position.

In a typical installation, the upper channel members 10 are connected to an upper concrete structure 70. This is usually done by inserting screw fasteners through the web 18 at a plurality of longitudinally and laterally spaced apart locations. In FIG. 5, two screw fastener locations are designated SF. In similar fashion, the lower channel member 12 is connected to a lower concrete structure (not shown) This is typically done by the use of laterally and longitudinally spaced apart screw fasteners (not shown) that extend between the lower web 24 and the lower concrete structure.

The upper and lower concrete structures are fixed relatively to each other most of the time. However, during earthquakes, and other times as well, there will be some vertical movement of the two concrete structures relative to each other. At times they may move relatively toward each other and at other times they may move relatively apart. As previously described, the studs 14 are connected to the lower channel member 12 and thus are in that manner connected to the lower concrete structure. However, they are not connected to either the upper channel member 10 or the upper concrete structure 70. The upper channel member 10 is connected to the upper concrete structure and thus can and will move with the upper concrete structure whenever it moves.

As best shown by FIGS. 3-7, the framing is covered (usually on both sides) by wallboard sheeting WS or some other form of sheeting. Typically, the sheeting comes in sheets measuring four feet by eight feet, or four feet by ten feet or four feet by twelve feet, for example. The thickness varies, for example, from one-half inch to five eights of an inch to three-quarters of an inch. The wallboard sheeting WS is secured to the studs 14, preferably by screw fasteners SF. Herein, “SF” is used to designate both the screw fasteners and openings which receive the screw fasteners. The screw fasteners SF extend through the wallboard sheeting WS and screw into the flanges 42, 44 of the studs 14.

FIGS. 4 and 5 show a single thickness of wallboard sheeting WS. The sheeting may, for example, be five eights (⅝″) GWB gypsum wallboard. A single thickness of wallboard sheeting WS (FIGS. 4 and 5) provides what is referred to as a one-hour wall system. This means that the wall will prevent fire from moving through it for about one hour. FIGS. 6 and 7 show two thicknesses of wallboard sheeting WS. This provides a two-hour wall system. That is, the wall will prevent fire from passing through it for about two hours. In either system, the upper edges 76, 78 are spaced below the lower edges 32, 34 of the upper channel member 10. In the illustrated embodiment, wallboard strips 80 are provided immediately outwardly of the side flanges 20, 22 of the upper channel member 10. Wider wallboard strips 82 are provided outwardly of the wallboard strips 80. Screw fasteners are used to secure the wallboard strips 80, 82 to the side flanges 20, 22 of the upper channel member. The wider strips 82 extend downwardly and overlap edge portions of the wallboard sheeting WS.

Referring to FIGS. 4-7, the wallboard sheeting WS is secured to the studs 10 and at its lower edge may be secured to the side flanges 28, 30 of the lower channel member 12. In any event, the studs 10 are connected to the side flanges 28, 30 of the lower channel members 12 and the sheeting is connected to the studs 14. This assembly by itself effectively unites the wallboard sheeting WS, the studs 14 and the lower channel members 12.

As shown by FIGS. 4-7, a vertical space exists between the upper edges 76, 78 of the wallboard sheeting WS, WS′. This allows the upper edges 76, 78 to move relatively upwardly into this space during relative upward movement of the channel members 10, 12 and the concrete structures to which they are connected. The wallboard sheeting WS, WS′ is connected to the studs 14 but is not connected to the clips 54. The clips 54 have a substantially rigid configuration. When the lower portion of a clip is telescopically received in the upper portion of its stud 14, the telescopic connection that is created resists most bending. The connection is reinforced by the cross sectional constructions of the stud 14 and the clips 54. FIGS. 9-12, 14-17 and 27-30 disclose telescopic connections between the clips and the studs 14 that are stiffened and further strengthened by additional structure. The clips shown by FIGS. 9 and 10 have what may be referred to as a “box” shape. They include a lipped channel and a panel that is secured to the lips of the channel by either screws or weld beads. Clips 54 a, 54 b each comprise a web 90, first and second flanges 92, 94 that are connected to the web 90 and extend perpendicular from it, and lips 96, 98. The lips 96, 98 are connected to the flanges 92, 94 and extend perpendicular to them, and parallel to the web 90. Lips 96, 98 are in coplanar parallelism. Clip 54 a includes a panel 100 that is fastened by screw fasteners SF to the lips 96, 98. In clip 54 b, the panel 102 is connected to the lips 96 by welds W. The “box” shape of clips 54 a, 54 b provides a more rigid dowel than the lipped channel shown by FIG. 8. These clips 54 a, 54 b are particularly suited for use in exterior wall structures that are subjected to large side loads (e.g. high velocity wind loads).

FIG. 11 shows providing the lips of the clip with longitudinal slots that are adapted to receive shank portions of screw fasteners that extend through openings in the stud web and then extend through the slots. Specifically, clip 54 c includes a web 104, flanges 106, 108 connected to the web 104 and lips 110, 112 connected to the flanges 106, 108. As in the earlier embodiments, the flanges 106, 108 are parallel to each other and are perpendicular to the web 104 and the lips 110, 112. In this embodiment, the lips 110, 112 may be wider than the lips 66, 68 in the clip 54 shown by FIG. 8. This is so that the lips 110, 112 can be provided with longitudinal slots 114. The slots 114 receive the shank portions of screw fasteners that are screwed into the on the stud web 14. In this embodiment, vertical movement of the clip 54 c relative to the stud 14 is limited by the length of the slots 114.

FIG. 12 discloses providing elongated slots in the web of the clip 54 d. Clip 54 d comprises a web 16, a pair of flanges 118, 120 and a pair of lips 122, 124. Web 116 is parallel to lips 122, 124 and is perpendicular to flanges 118, 120. At least one (but preferably two) slot 126 is formed in the web 116. Slot(s) 126 receive shank portions of screw fasteners used to secure the clip 54 d to a stud 14. As in the last embodiment, the relative movement between the clip 54 d and the stud 14 is limited by the length of the slot(s) 126.

FIG. 13 shows a simpler clip 54 e comprising a web 128 and two flanges 130, 132. This clip 54 e is not as rigid as the other clips and should only be used in internal wall systems that experience relatively low side loads. Clip 54 e is telescopically received within the upper end portion of a stud 14, in the manner shown by FIG. 1. The only difference is that in the system that includes a clip 54 e, the free edges of the flanges 130, 134 extend substantially to the inner surfaces of the lips 46, 48 on the stud 14.

FIGS. 14-17 show providing the clip 54 f with longitudinal channels 134 outwardly of its lips 136, 138. The stud lips 46, 48 are received in the channels 134. This fit strengthens the telescopic connection. As illustrated, the clip 54 f includes a web 140 flanges 142, 144 and the channels 134. As best shown by FIGS. 16 and 17, the channels 134 are formed by and between inner lips 146, 148 and outer lips 150, 152. The lips 146, 148 and 150, 154 are substantially parallel to each other and the web 140 and are substantially perpendicular to the flanges 144, 142. FIG. 17 is a cross sectional view through the stud 14 and the clip 54 f. This view clearly shows the stud lips 46, 48 received within the channels 134. This provides an interlock between the two members and results in a stiffened connection, capable of withstanding substantial bending force at the connection.

FIG. 18 shows a clip 150 that includes an upper portion 152 and a lower portion 154 that is telescopically received in the stud 14. Upper portion 152 is a flat panel that is adapted to extend horizontally. It is connected to a vertical panel 156 that has a width substantially equal to the distance between the stud flanges 42, 44. At its lower end, panel 156 connects to a panel 158. Another panel 160 is connected to panel 158. Panel 152 is perpendicular to panels 156 and 160. It is parallel to panel 158. Panels 156 and 160 have a common width that is equal to the width of panel 156. The distance between the side of panel 156 that is contiguous the web 40 and the side of panel 160 that is contiguously webs 46, 48 is substantially equal to the distance between the web 40 and the webs 46,48. Panel 156 is substantially the length of the clips that have already been described e.g. clip 54 in FIGS. 1 and 2. In this embodiment, the panel 152 is moved upwardly against the upper web 18 of the upper channel member 10. Then, screw fasteners are inserted through the openings designated as SF. The screws are inserted upwardly from below panel 152, through the openings SF. They are then screwed into the upper web 18. When the screws are tightened, they draw the panel 152 into tight engagement with the web 18. This secures the clip 152 to the upper channel member 10. The lower portion of the clip 152, composed of panels 154, 156, and 160 are snuggly received within the stud 14. The shape of the panels 154, 158, 160, and their snug fit within the stud 14, substantially restrains the stud 14 and clip 150 from movement relative to each other in all directions except for the vertical direction. The telescopic connection between the clip 150 and the stud 14 permits relative vertical movement between the two members 150,14.

FIG. 19 shows a modified clip 162. In this embodiment, the panel 160′ extends upwardly from panel 158 on its side of panel 158 in the same manner that panel 156 extends up from the opposite side of panel 158. The upper end of panel 160′ is connected to another panel 164. Panels 152, 164 are in coplanar parallelism. Both of these panels are connected to the upper web 18 of the upper channel member 10 by screw fasteners SF which are inserted upwardly through the openings SF. In this embodiment, the panels 156, 158, 160′ form the lower portion of the clip 150 that is telescopically received in the upper portion of the stud 14. Preferably, the structure formed by panels 156, 158, 160′ is snuggly received within the stud 14. It substantially restrains relative movement between clip 150 and stud 14 in all directions except the vertical direction. Relative movement is possible in the vertical direction because of the telescopic connection between the two members.

FIGS. 27-30 show providing at least one longitudinal slot in the web of the stud. Screw fasteners SF extend through the slots and then screw into the webs of the clips. In FIGS. 27-30 the same reference numerals will be used that are used in FIGS. 1-2 except for where there is a difference. In FIGS. 27 and 28 the difference is the existence of a single slot 180 in the stud web 40. In FIGS. 29 and 30, the difference is the presence of two slots 180 in the stud web 40. In these embodiments, a screw fastener 182 extends first through the slot 180 and then screws into the web 60 of clip 54 at location 184 (FIG. 28). In FIGS. 29 and 30, two screw fasteners 182 extend through the two slots 180 and then screw into the web 60 of the clip 54 at location 186. In the two embodiments shown by FIGS. 27-30, relative vertical movement can occur between the clip 54 and the stud 14 within limits set by the ends of the slots 180.

FIGS. 20-24 show a screw fastener 190 (also SF) that includes a slotted head 192 adapted to receive a tip of a screwdriver in the slot 194 (FIG. 21). A threaded shank 196 is connected to the head 192 and extends away from it on the side of the head 192 opposite the slots 194. At its end opposite the head 192, the shank 196 includes a tip 198 that is in the nature of a drill bit tip. It is adapted to drill a hole through one or more sheet metal members in response to rotation of the screw fastener 190.

FIG. 20 shows the screw fastener 190 with its tip 198 spaced from a pair of sheet metal members. By way of example, these members may be side flange 20 of the upper channel member 10 and flange 42 of the stud 14. In a manner known per se, when the screw fastener 190 is moved to place its tip 198 against the first member 20, and then a power driver is used to rotate the screw fastener 190, the tip 190 drills a hole first through member 20 and then through member 42. Then, upon further rotation of the screw fastener 190, the threaded portion of the shank 196 moves the screw fastener 198 through the openings until its head 192 is against member 20. This connects the two members 20,42 together with the head 192 bearing tight against the member 20, as shown by FIG. 22.

FIG. 24 shows the screw fastener tip 198 spaced from a pre-drilled opening 200 in the member 20. In this embodiment, the tip 198 only has to drill through the metal member 42. The provision of pre-drilled holes 200 in one of two members that are to be connected together substantially reduces the installation time of the screw fasteners. Again, this is because the tip 198 does not have to drill its way through two members. It only has to drill its way through one member.

When clips 54 c, 54 d are used, the screw fastener is used to form an opening in a stud panel at a location immediately outwardly from a slot 114, 26. When clip 54 c is used, the lips 110,112 are preferably inwardly contiguous the stud web 40. Thus, the screw fastener drills a hole for itself through the web 40 and then it moves through the slots 114. The screw fastener 190 can be driven until its head 192 is tight against the web 40. Each slot 114 is wider than the threaded shank of the screw fastener 190. As a result, the threads of the screw fastener 190 do not engage the lips 110, 112 of the clip 54 c. As a result, the clip 54 c is able to move up and down freely relative to the stud 14 between the two ends of the slots 114.

In the embodiment of FIG. 12, the web 116 is inwardly contiguous the stud web 40. Again, the screw fasteners 190 bite into the web 40 but not the web 116. The threaded shanks of the screw fasteners 190 pass through the slots 196, resulting in clip 54 d being freely movable vertically relative to the stud 14.

FIGS. 25 and 26 show a modified screw fastener 204 that is for use with the embodiments shown by FIGS. 27-30. Screw fastener 204 includes a threaded shank 206, a drill tip 208 between the head 210 and the threaded shank 206. The diameter 214 of member 212 is smaller than the width dimension of the slot 180. The axial dimension 216 of member 212 is greater than the thickness of web 40. When this embodiment is used, the screw fastener is aligned with a slot 180, with its tip at one of the locations 184,186. Then the screw fastener is rotated and moved axially through the slot 180 and against the web 60, causing tip 208 to drill its way through the web 60. Following the making of an opening in web 60, the threaded shank 206 engages the edges of the opening and pulls the threaded fastener 204 through web 60 until member 212 is within the slot 180. In this embodiment, when the screw fastener 204 is tightened, the surface 218 is moved tight against web 60 where it surrounds the opening. This is shown by FIG. 26. FIG. 26 also shows that the spacer member 212 is narrower that the slot and when the surface 218 is against web 60, the head 210 is spaces axially from the web 40. Thus, the screw fastener 204 can be screwed in as far as it will go without web 40 being clamped between head 210 and web 60. As a result, the clip 54 is free to move longitudinally relative to the stud 14, within the limits of the end of the slots 180.

The clips may be united with the studs in the factory or the clips and studs may be sent to the job site unassembled and assembled there. The lower end portion of each stud is inserted into the channel space of the lower channel member 12. The stud 14 is put into a vertical position with its lower butt end resting on the lower web 24 of the lower channel member 12. When the stud 14 is substantially vertical, its upper butt end 52 is spaced above the lower edges 32,34 of the side flanges 20,22 of the upper channel member 10 and below the upper web 18 of the upper channel member 10. The upper portions of the web side flanges 42,44 are sandwiched between the side flanges 20,22 of the upper channel member 10 and contiguous portions of the clip. In most of the embodiments, this portion of the clip is a side flange of the clip. See flanges 18,20 in FIG. 12, for example. Next, the upper end portion of the clip is connected to the upper channel member. In most of the embodiments, a screw fastener SF is inserted through the side flanges 20,22 of the upper channel member 10 and then through the adjacent side flanges of the clip. In the other embodiments, the upper portion or portions of each clip is secured to the web 18 of the upper channel member 10, by the use of screw fasteners. Next, the wallboard sheeting WS is connected to the studs 14 but not in the regions of the clips or the side flanges 20,22 of the upper channel member.

As previously stated, the lower channel member 12 is typically secured to a lower concrete structure, e.g. a concrete slab in the building. The upper channel member 10 is in a similar fashion secured to an upper concrete structure, e.g. another concrete slab that is positioned above the first slab. The connection of the upper channel member 10 to the upper concrete structure will result in the upper concrete structure and the channel member 10 moving together if there is any reason for either one of them to move. The same is true with respect to the lower concrete structure and the lower channel member 12. Over time, buildings settle and their floor structures move relative to each other. Also, during an earthquake, there can be substantial movement of the concrete structures relative to each other. The use of the clips together with the shortened studs provides a telescopic connection between the clip and the stud that will accommodate the movement that will occur under most circumstances. At the same time, the stud is firmly connected to both the upper channel member 10 and the lower channel member 12 for movement normal to the plain of the wall and parallel to the plain of the wall. As has been described, there are a number of ways of constructing the clips so that they well strengthen the telescopic connection and resist any tendency of the assembly to bend at the connection. This is all accomplished without the use of slots in the side flanges 20,22 of the upper channel member, or the clip, that must be located by the installer so that he will avoid placing a screw fastener at a location where it will secure the stud to the upper channel member in such a way that relative vertical movement between them is prevented.

The use of slots such as shown by FIGS. 11,12 and 27-30 does not present a problem because these slots are used in the connection of the clip to the stud. This connection does not have to be done through wallboard sheeting. It is done at a time when the location of the slot is clearly visible and care can be taken to see that the screw fastener is properly positioned in the slot. Also, if a screw fastener should be installed in a position where it screws the clip to the stud, the workman see this and can remove the screw fastener and replace it with a properly located screw fastener before sheeting is place on the wall. Also, when it is elected to pre-assemble the clips and the studs in the factory, jigs can be developed that will make the drilling operation exact and substantially automatic.

FIG. 31 is an end view of a clip 54 c where it is telescopically received within a stud 14. This system can be compared with the system shown by FIGS. 29 and 30. The difference is, in this system the clip 54 c is turned around before it is inserted into the stud 14. Its lips 110,112 are contiguous the stud web 40. Screw fasteners are provided at SF. These screw fasteners can either screw into one of the metal members and then extend through a slot in the other, or they can first extend through a slot in one member and then screw into the other member. For example, the screw fasteners SF may screw through the stud web 40 and then extend through the slots 114 in the lips 110,112 of the clip 54 c.

The system shown by FIG. 32 comprises a stud 14′ having relatively wide lips 46′,48′. Either the lips 46′,48′ include slots or the slots are formed in the clip web 60. In any event, the screw fasteners SF either extend through a slot in a first member and then screw into the second member, or screw into the first member and then extend through a slot in the second member. When the screw fastener SF passes through the slot first, a screw fastener like screw fastener 204 (FIGS. 25 and 26) is used. When the screw fastener first screws into a metal member and then extends through a slot in the other member, a screw fastener like the screw fastener 196 (FIGS. 20-24) is used.

It is to be understood that in all of the embodiments that have been shown and described, the screw fastener may first screw into a first metal member and then extend through a slot in the second metal member. Or, it may first extend through a slot in a first metal member and then screw into the second metal member. In each case, the appropriate screw fastener 196,204 is used.

FIGS. 33-35 show another embodiment of the invention. In this embodiment, a clip is used that is positioned within the channel space 16 adjacent to but outside of the upper end portion of the stud 14. The clip may be like any of the clips that have been illustrated and described. In FIGS. 33-35, by way of an example, a clip 54 e′ is used. The difference between clip 54 e′ and clip 54 e is that in clip 54 e′ the distance between the outer sides of the flanges 130,132 is substantially equal to the distance between the inner sides of the flanges 20,22 of the upper channel member 10. As illustrated, screw fasteners SF are used to secure the flanges 20,22 to the flanges 132,130, respectively. This is done when the upper butt end of the clip 54 e′ is up against the lower surface of the web 18. This abutting relationship of the end of the clip 54 e′ and the use of the two screw fasteners SF keeps the clip 54 e′ from rotating in position inside the channel space 16. In this embodiment, slots are either provided in the stud web 40 or in the clip web 128. Screw fasteners are used at the locations of these slots to secure the upper end portion of the stud 14 to the clip 54 e′. As previously described, the screw fasteners may extend either first through the slots and then into the other web member. Or they may first screw through a web member and then extend through the slots in the other web member. A screw fastener like screw fastener 196 is used when the screw fastener is first screwed into a web. A fastener like fastener 204 is used when the screw fastener first extends through a slot and then screws into the adjacent web. When the parts are assembled, relatively vertical movement is permitted between the upper channel member 10 and the stud 14 and the wall of which the stud 14 is a part. The screw fasteners extending through the two webs 40,128, acting with the slots, provide a rigid connection in a direction normal to the wall. This connection also results in the upper end portion of the stud 14 being restrained against all kinds of movement except vertical movement relative to the upper channel member 10 and the clip 54 e′.

Herein, unless otherwise specified, the screw fasteners may be nut and bolt assemblies rather than screw members. Thus, bolts may be provided that have shoulder portions adjacent the bolt heads that are adapted to extend into slots formed in one of the metal members. The shoulder has an end portion that bears against the metal member that does not include the slot. The shoulder is long enough so that when the end of the shoulder is against the metal, the head of the fastener is spaced away from the slotted member a small amount, so that the fastener head will not clamp the slotted member to the other member when it is tightened.

FIG. 36 is similar to FIG. 7 except that the upper track member 10 that is in FIG. 7 has in FIG. 36 been replaced by a pair of angle iron members 200, 202. Angle iron member 200 includes a horizontal flange 204 and a vertical flange 206. Channel member 202 includes a horizontal upper flange 208 and a vertical flange 210. Flange 206 makes a right angle connection with flange 204. In similar fashion, flange 210 makes a right angle connection with flange 208. Flanges 200, 202 are secured to the overhead structure 212 by suitable fasteners 214. The vertical flanges 206, 210 are spaced apart substantially the same distance as the side flanges 20, 22 in the previously described upper channel member 10. When the channel member 10 is used, the side flanges 20, 22 form a channel or “track” space between them. In like fashion, in the embodiment of FIG. 36, the vertical flanges 206, 210 form a channel or “track” space between them. The clip 54 is telescopically received in the upper end portion of the stud 14. Screw fasteners 216 are used to connect the side flanges 206, 210 to the upper portion of the clip 54.

In the embodiment of FIG. 36, the angle iron members 200, 206 may be separately attached to the structure 212, and then the clips 54 may be inserted and connected to the side flanges 206, 210. Or, a plurality of the clips may be connected to the side flanges 206, 210 of the angle iron members 200, 202, to form an assembly composed of the angle iron members 200, 202 and the clips 54. Then, this assembly can be lifted up and set in place and then secured to the structure 212 by the fasteners 214 that first pass through the horizontal legs or flanges 204, 208 of the angle iron members 200, 202.

The remainder of the assembly shown by FIG. 36 is like the previously described assembly shown by FIG. 7. Therefore, it will not be separately described in more detail. In this embodiment, each of the previously described-clips, and also later developed clips, can be used with the angle iron members 200, 202.

The studs, the channels, the angle iron members and the clips are all formed from between twelve and twenty-six gauge sheet metal. Bend radiuses are formed between the flanges and the webs of the channel members, between the lips and the flanges of the lip channel members and between the two legs or flanges of the angle iron members. Preferably, the clips measure about four inches in length. Preferably, the side flanges of the channel members 10, 12 and the vertical flanges of the angle iron members 200, 202 are about 2.5 inches in the vertical direction. The static distance between the lower edges of the side flanges 20, 22 and the upper butt ends of the studs 14 is preferably about one and one-half inches. The slots may be about three-sixteenths inches in width and about two inches in length.

The illustrated embodiments are only examples of the present invention and, therefore, are non-limitive. It is to be understood that many changes in the particular structure, materials and features of the invention may be made without departing from the spirit and scope of the invention. Therefore, it is my intention that my patent rights not be limited by the particular embodiments illustrated and described herein, but rather are to be determined by the following claims, interpreted according to accepted doctrines of patent claim interpretation, including use of the doctrine of equivalents and reversal of parts. 

1. A wall structure, comprising: a downwardly opening upper channel member including an upper web and a pair of spaced apart side flanges depending from the upper web to lower edges, said upper web and side flanges forming a channel space below the upper web and between the side flanges; a plurality of horizontally spaced apart, vertically extending studs that are each said stud including an upper end portion and an upper butt end; said upper end portions of said studs being received in the channel space, with the butt ends of the studs being positioned above the lower edges of the side flanges of the upper channel member; a clip for each said stud, each said clip comprising an upper portion secured to the upper channel member and a lower portion that extends downwardly from the upper portion into the upper end portion of its stud, said lower end portions of the clips being snugly received within, and frictionally engaging, the upper end portions of the studs; and said studs being movable up and down in the channel space relative to both the clips and the upper channel member upon being subjected to forces that overcome the frictional forces.
 2. The wall construction of claim 1, wherein each stud comprises a web extending perpendicular to the side flanges of the upper channel, front and rear flanges connected to the web and extending parallel to the side flanges of the upper channel, and lips connected to the flanges and extending towards each other, in coplanar parallelism, said lips being in spaced parallelism with the web.
 3. The wall construction of claim 2, wherein the clip has front and rear boundaries that are contiguous the stud flanges.
 4. The wall construction of claim 1, wherein each stud comprises a web extending perpendicular to the side flanges of the upper channel, and front and rear flanges connected to the web and extending parallel to the side flanges of the upper channel, said front and rear flanges of the stud having upper end portions which are contiguous the side flanges of the upper channel member, and wherein each said clip comprises a web that is inwardly contiguous the web of its stud, and front and rear flanges connected to the web of the clip that are inwardly contiguous the front and rear flanges of the stud.
 5. The wall construction of claim 4, comprising screw fasteners extending through the side flanges of the upper channel and through the front and rear flanges in the upper portions of the clips, wherein upper portions of the front and rear flanges of the stud are sandwiched between the side flanges of the upper channel and lower portions of the front and rear flanges of the clip.
 6. The wall construction of claim 5, wherein the web and the front and rear flanges of the clip are vertically straight and the web and the front and rear flanges of the stud are vertically straight.
 7. The wall construction of claim 2, wherein the clip has front and rear panels that are inwardly contiguous the front and rear flanges of the stud, and perpendicular panels that extend between and interconnect the front and rear panels.
 8. The wall construction of claim 1, wherein each stud includes a web extending perpendicular to the side flanges of the upper channel member, and the clip includes a web that is inwardly contiguous the web of the stud, wherein one of said webs includes at least one vertical slot and a screw fastener extends through the slot and the other web, and connects the clip to the stud, with the slot being positioned to allow up and down movement of the clip relative to the stud and the upper channel member.
 9. The wall construction of claim 2, wherein the clip includes lips that are inwardly contiguous the lips on the stud, wherein at least one of the contiguous lips includes a vertical slot, and wherein a screw fastener extends through the slot and connects the clip to the stud, for vertical movement of the clip relative to the stud and the upper channel member.
 10. The wall construction of claim 2, wherein the clips are telescopically received within the studs and the clips include longitudinal channels in which the lips on the studs are received.
 11. The wall construction of claim 1, wherein each clip includes at least one upper portion that extends perpendicular to the stud and parallel to the upper web of the upper channel member, and wherein at least one screw fastener connects said upper portion of the clip to the upper web of the upper channel member.
 12. The wall construction of claim 11, wherein the clip includes two upper portions which extend perpendicular to the stud and parallel to the upper web of the upper channel member, wherein one said upper portion extends along the upper channel member in a first direction from the clip, and the other upper portion extends along the upper channel member in the opposition direction from the clip, and wherein at least one fastener is used to connect at least one of said upper portions of the clip to the upper web of the upper channel member.
 13. The wall construction of claim 12, wherein each upper portion of the clip is connected to the upper web of the upper channel member by at least one fastener.
 14. A wall structure, comprising: a downwardly opening upper channel member including an upper web and a pair of spaced apart side flanges depending from the upper web to lower edges, said upper web and side flanges forming a channel space below the upper web and between the side flanges; an upwardly opening lower channel member including a lower web and a pair of spaced apart side flanges extending upwardly from the lower web to upper edges, said lower web and side flanges forming a channel space above the lower web and between the side flanges; said upper web being spaced above the lower web a predetermined distance; a plurality of horizontally spaced apart, vertically extending studs, each said stud including an upper end portion with an upper butt end and a lower end portion with a lower butt end; said lower end portions of said studs being received in the lower channel space, above the lower web and between the side flanges of the lower channel member; said lower butt ends of the studs being supported by the lower web of the lower channel member; said upper end portions of the studs being received in the upper channel space with the upper butt ends spaced below the upper web of the upper channel member a predetermined distance, said upper butt ends being positioned above the lower edges of the side flanges of the upper channel member; a clip for each said stud, each said clip comprising an upper portion secured to the upper channel member and a lower portion that extends downwardly from the upper portion into the upper end portion of its stud, said lower end portions of the clips being snugly received within, and frictionally engaging, the upper end portions of the studs; and said upper butt ends of the studs being movable up and down in the upper channel space relative to both the clips and the upper channel member.
 15. The wall construction of claim 14, wherein each stud comprises a web extending perpendicular to the side flanges of the upper channel, front and rear flanges connected to the web and extending parallel to the side flanges of the upper channel, and lips connected to the flanges and extending towards each other, in coplanar parallelism, said lips being in spaced parallelism with the web.
 16. The wall construction of claim 15, wherein the clip has front and rear boundaries that are contiguous the stud flanges.
 17. The wall construction of claim 14, wherein each stud comprises a web extending perpendicular to the side flanges of the upper channel, and front and rear flanges connected to the web and extending parallel to the side flanges of the upper channel, said front and rear flanges of the stud having upper end portions which are contiguous the side flanges of the other channel member, and wherein each said clip comprises a web that is contiguous the web of its stud, and front and rear flanges connected to the web of the clip that are inwardly contiguous the front and rear flanges of the stud.
 18. The wall construction of claim 17, comprising screw fasteners extending through the side flanges of the upper channel and through the front and rear flanges of the upper portions of the clips, wherein upper portions of the front and rear flanges of the Stud are sandwiched between the side flanges of the upper channel and lower portions of the front and rear flanges of the clip.
 19. The wall construction of claim 18, wherein the web and the front and rear flanges of the clip are vertically straight and web and the front and rear flanges of the stud are vertically straight.
 20. The wall construction of claim 15, wherein the clip has front and rear panels that are inwardly contiguous the front and rear flanges of the stud, and perpendicular panels that extend between and interconnect the front and rear panels.
 21. The wall construction of claim 14, wherein each stud includes a web extending perpendicular to the side flanges of the upper channel member, and the clip includes a web that is inwardly contiguous the web of the stud, wherein one of said webs includes at least one vertical slot and a screw fastener extends through the slot and the other web, and connects the clip to the stud, with the slot being positioned to allow up and down movement of the clip relative to the stud and the upper channel member.
 22. The wall construction of claim 15, wherein the clip includes lips that are inwardly contiguous the lips on the stud, wherein at least one of the contiguous lips includes a vertical slot, and wherein a screw fastener extends through the slot and connects the clip to the stud, for vertical movement of the clip relative to the stud and the upper channel member.
 23. The wall construction of claim 15, wherein the clip is telescopically received within the stud and the clip includes longitudinal channels in which the lips on the stud are received.
 24. The wall construction of claim 14, wherein the clip includes at least one upper portion that extends perpendicular to the stud and parallel to the upper web of the upper channel member, and wherein at least one fastener connects said at least one upper portion of the clip to the upper web of the upper channel member.
 25. The wall construction of claim 14, wherein the clip includes two upper portions that extend perpendicular to the stud and parallel to the upper web of the upper channel member, one of said upper portions extending along the upper channel member in a first direction from the clip and the other said upper portion extending along the upper channel member in the opposite direction from the clip, and wherein at least one fastener connects at least one of said upper portions of the clip to the upper web of the upper channel member.
 26. The wall construction of claim 25, wherein at least one screw fastener extends through each one of the upper portions of the clip and connects it to the upper web of the upper channel member.
 27. A wall structure, comprising: a downwardly opening upper channel member including an upper web and a pair of spaced apart side flanges depending from the upper web to lower edges, said upper web and side flanges forming a channel space below the upper web and between the side flanges; a plurality of horizontally spaced apart, vertically extending studs that are each said stud including an upper end portion and an upper butt end; said upper end portions of said studs being received in the channel space, with the butt ends of the studs being positioned above the lower edges of the side flanges of the upper channel member and below the upper web; a clip for each said stud, each said clip, being secured to the upper channel member, contiguous the upper end portion of its stud; wherein one of said clip and said upper end portion of the stud includes a first panel including at least one elongated vertical slot and the other includes a second panel; wherein a screw fastener extends through the slot and connects the two panels together; and said studs being movable up and sown in the channel space relative to both the clips and the upper channel member.
 28. The wall structure of claim 27, wherein the screw fastener extends through the slot in the first panel and then screws into the second panel.
 29. The wall structure of claim 28, wherein the screw includes a head and a shoulder at the base of the head that fits within the slot, said shoulder having an end surface that bears against the second panel, said shoulder being of sufficient length to keep the head of the screw fastener away from clamping the first panel to the second panel.
 30. A wall structure, comprising: an upper track including a pair of spaced apart side flanges depending from the upper edges to lower edges, said side flanges forming a track space between the side flanges; a plurality of horizontally spaced apart, vertically extending studs that are each said stud including an upper end portion and an upper butt end; said upper end portions of said studs being received in the track space, with the butt ends of the studs being positioned above the lower edges of the side flanges; a clip for each said stud, each said clip comprising an upper portion secured to the side flanges and a lower portion that extends downwardly from the upper portion into the upper end portion of its stud, said lower end portions of the clips being snugly received within, and frictionally engaging, the upper end portions of the studs; and said studs being movable up and down in the track space relative to both the clips and the upper channel member upon being subjected to forces that overcome the frictional forces.
 31. The wall construction of claim 30, wherein each stud comprises a web extending perpendicular to the side flanges of the upper track, front and rear flanges connected to the web and extending parallel to the side flanges of the upper channel, and lips connected to the flanges and extending towards each other, in coplanar parallelism, said lips being in spaced parallelism with the web.
 32. The wall construction of claim 31, wherein the clip has front and rear boundaries that are contiguous the stud flanges.
 33. The wall construction of claim 30, wherein each stud comprises a web extending perpendicular to the side flanges of the upper track, and front and rear flanges connected to the web and extending parallel to the side flanges of the upper track, said front and rear flanges of the stud having upper end portions which are contiguous the side flanges of the upper track, and wherein each said clip comprises a web that is inwardly contiguous the web of its stud, and front and rear flanges connected to the web of the clip that are inwardly contiguous the front and rear flanges of the stud.
 34. The wall construction of claim 33, comprising screw fasteners extending through the side flanges of the upper track and through the front and rear flanges in the upper portions of the clips, wherein upper portions of the front and rear flanges of the stud are sandwiched between the side flanges of the upper channel and lower portions of the front and rear flanges of the clip.
 35. The wall construction of claim 34, wherein the web and the front and rear flanges of the clip are vertically straight and the web and the front and rear flanges of the stud are vertically straight.
 36. The wall construction of claim 30, wherein each stud includes a web extending perpendicular to the side flanges of the upper track, and the clip includes a web that is inwardly contiguous the web of the stud, wherein one of said webs includes at least one vertical slot and a screw fastener extends through the slot and the other web, and connects the clip to the stud, with the slot being positioned to allow up and down movement of the clip relative to the stud and the upper track.
 37. Sheet metal framing, comprising: a first sheet metal framing member including a first panel, said first panel including at least one elongated slot; a second sheet metal framing member including a second panel that is contiguous the first panel of the first sheet metal framing member; a screw fastener extending through the slot in the first panel and screwing into the second panel; said screw fastener including a head and a shoulder at the base of the head that fits within the slot, said shoulder having an end surface that bears against the second panel; and said shoulder being narrower than the slot and of a sufficient length to keep the head of the screw fastener away from clamping the first panel to the second panel when the screw is connected to the second panel and the end surface of the shoulder is against the second panel.
 38. The sheet metal framing of claim 37, wherein the first and second frame members are telescopically engaged and the second frame member is inside the first frame member.
 39. The sheet metal framing of claim 38, wherein the second framing member is a lipped channel member comprising a web having opposite edges, a pair of flanges connected to the opposite edges and projecting from the web parallel to each other, and having outer edges spaced from the web, and lips extending inwardly from the outer edges of the flanges in co-planar parallelism; and wherein the web of the first framing member is the said first panel.
 40. The sheet metal framing of claim 39, wherein the first framing member is a lipped channel member comprising a web having opposite edges, a pair of flanges connected to the opposite edges and projecting from the web parallel to each other, and having outer edges spaced from the web, and lips extending inwardly from the outer edges of the flanges in co-planar parallelism; and wherein the web of the first framing member is said second panel. 